-LRB- CNN -RRB- -- Sri Lanka 's cricket team returned home to Colombo early Wednesday , as police in Pakistan searched for at least 12 gunmen believed responsible for the attack that left seven people dead .

Sri Lankan player Thilan Samaraweera is taken aboard an ambulance Wednesday in Colombo .

Police in Lahore on Wednesday confirmed six police officers and a driver of a van carrying umpires were killed after earlier reports had put the death toll at eight .

Six team members were wounded by glass and shrapnel , and two -- Tharanga Paranavitana and Thilan Samaraweera -- were shot in the chest and leg , respectively . Both men were being treated in Colombo and in stable condition , officials said .

`` We are very lucky that no one -LSB- sustained -RSB- any serious injuries and everyone is in good shape , '' one player told reporters upon arriving in the capital . `` There are a few more guys who need more time to recover . And we can hopefully put this behind us and move forward . ''

The attack happened Tuesday at about 9 a.m. -LRB- 11 p.m. ET Monday -RRB- , as the visiting Sri Lankan team 's bus approached Lahore 's Gaddafi Stadium for a match against Pakistan . See a map of where the attack took place ''

The brazen daylight attack sent shock waves across the cricket-crazy region and raised fears about the future of world cricket matches in Pakistan , which has been reeling from a string of terrorist attacks . iReport : Send us your videos , photos

`` The events can only be described as shocking , and we send our sympathy to the relatives of those who lost their lives , '' International Cricket Council President David Morgan said at a news conference in London Tuesday . `` On many occasions we 've been told that cricketers would never be targeted in Pakistan . And this morning 's events have proved that to be quite incorrect . '' Watch ICC 's reaction to the attack ''

ICC Chief Executive Haroon Lorgat said none of the teams had been threatened before Tuesday 's attack , which happened about 150 meters from the stadium in Lahore .

Investigators can not yet say who was responsible for the ambush . Watch footage of the gunmen staging their attack ''

Pakistan President Asif Ali Zardari praised Pakistani police , saying the officers `` rose to the occasion and laid down their lives to protect our Sri Lankan guests . '' He also telephoned Sri Lankan President Mahinda Rajapaksa to express his condemnation and regrets , and to emphasize his determination to investigate . Watch Sri Lankan 's foreign minister condemnation of the attack ''

Teams have long stayed away from Pakistan , concerned about the security situation in a country that is battling an escalating pro-Taliban insurgency . But Sri Lanka -- a country enduring its own civil war with separatist rebels -- agreed in December to visit for a series of matches , after the Indian cricket team called off its tour following the deadly terror attacks in Mumbai in November . Indian authorities blamed those attacks on Pakistan-based militants .

The Pakistan Cricket Board had said it was set to lose more than $ 16 million as a result of India 's cancellation , but the Sri Lanka visit was to help it recoup most of the costs , officials said .

The Sri Lankan offer to tour was a reciprocal gesture . Pakistan was one of two countries that agreed to tour Sri Lanka during the 1996 World Cup tournament , while other countries refused to travel there because of security concerns .

With this attack , fans now worry that Pakistan wo n't be able to co-host the 2011 Cricket World Cup with India , Bangladesh and Sri Lanka . Morgan said the ICC 's board will be meeting in April to consider whether the Cup will include stops in Pakistan .

`` The board will have to think very carefully about the extent to which Pakistan will be used for that event , '' Morgan said . `` It 's a very important event , but the safety and security of players , officials and supporters is very important and the board will be taking that into account . '' Read profiles of the wounded players ''

`` This has really damaged Pakistan , '' former Pakistani cricket player Zahir Abbas told Geo-TV . `` Already some teams did n't want to come to Pakistan . Now who will come after this incident ? ''

John Stern , the editor of cricket magazine Wisden , said it was `` not possible '' to imagine international cricket taking place in Pakistan in the near future . He described the situation for the sport in the country as `` desperate . '' Watch how attack strikes at legitimacy of Pakistani government ''

He said one possibility for the Pakistani team is to play its matches in the United Kingdom , which has a large Pakistani community .

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NEW : Players Tharanga Paranavitana , Thilan Samaraweera in stable condition

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Both were shot in the chest and leg , respectively

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Six other team members were wounded by broken glass and shrapnel

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Police confirm six officers and a driver of a van carrying umpires were killed